Demonstration of laser-frequency upshift by electron-density modulations in a plasma wakefield
Demonstration of laser-frequency upshift by electron-density modulations in a plasma wakefield
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DOI：
10.1103/physrevlett.99.135001
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发表时间：
2007-09-28
影响因子：
8.6
通讯作者：
Tajima, T.
中科院分区：
文献类型：
--
作者：
Kando, M.;Fukuda, Y.;Tajima, T.
在高功率激光产生的等离子体尾波中，电子密度的调制呈现出抛物面密集壳的形状，几乎以光速运动。由于双多普勒效应，反向传播的激光脉冲部分被壳反射，充当相对论性的飞镜，产生时间压缩的频率倍增脉冲。实验中检测到等离子体尾波的反向激光脉冲反射伴随着其频率倍增（倍数为50 ~ 114）。
In a plasma wake wave generated by a high power laser, modulations of the electron density take the shape of paraboloidal dense shells, moving almost at the speed of light. A counterpropagating laser pulse is partially reflected from the shells, acting as relativistic flying mirrors, producing a time-compressed frequency-multiplied pulse due to the double Doppler effect. The counterpropagating laser pulse reflection from the plasma wake wave accompanied by its frequency multiplication (with a factor from 50 to 114) was detected in our experiment.